The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2016
Filed:
Feb. 18, 2015
Voltage conversion circuit, strobe device, photographing device and method of reducing surge voltage
Applicant:
Ricoh Imaging Company, Ltd., Tokyo, JP;
Inventor:
Shinichi Kakiuchi, Saitama, JP;
Assignee:
RICOH IMAGING COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/36 (2006.01); H02J 7/00 (2006.01); H02M 5/458 (2006.01); H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
H02M 5/458 (2013.01); H05B 37/02 (2013.01);
Abstract
A voltage conversion circuit, comprising: a transformer that converts a voltage input to a primary side and outputs a converted voltage from a secondary side; a switching unit configured to switch on/off of electrification of the primary side of the transformer; and a bypass unit configured to transmit charges from the secondary side to the primary side of the transformer when the switching unit is off, so as to reduce a surge voltage caused on the switching unit.